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![Report on the Geological Survey of Iowa. by J. Hall, J. D. Whitney. [With Maps.] Vol. 1. by James Hall](https://d3fa68hw0m2vcc.cloudfront.net/ac3/166664133.jpeg "Report on the Geological Survey of Iowa. by J. Hall, J. D. Whitney. [With Maps.] Vol. 1. by James Hall")
![Report on the Geological Survey of Iowa. By J. Hall, J. D. Whitney. [With maps.] vol. 1. by * Anonymous](https://d3fa68hw0m2vcc.cloudfront.net/b76/166631205.jpeg "Report on the Geological Survey of Iowa. By J. Hall, J. D. Whitney. [With maps.] vol. 1. by * Anonymous")
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Josiah Dwight Whitney